The neutrinoless double-beta decay is not allowed in the Standard Model (SM) but it is allowed in most Grand Unified Theories (GUTs). The neutrino must be a Majorana particle (identical with its antiparticle) and must have a mass to allow the neutrinoless double-beta decay. Apart of one ...
Decay schemes are proposed based on gamma-ray energies and intensities and gamma-gamma coincidence results. A new half-life of (17.7±0.1) min, besides the well known 4.4 h one, was observed in the 129Sb decay. A level scheme fed by this decay is proposed taking into account our results...
The branching to the 509 keV level is< 5 × 10-4, which confirms a recent theoretical estimate of the isospin mixing in this level and its analog in74Rb. We also show that high-precision, complete spectroscopy must be performed to obtain meaningfulβdecay branching ratios. 展开 ...
I was trying to understand beta decay as a beginner but came across some difficult point and need your guidance. Thank you! Hi, Please note that I'm trying to understand it at very basic level. I'd really appreciate if you could help me with the queries below. I wa...
The elements in our Universe are composed of electrons, protons and neutrons at the fundamental level. Both the protons and neutrons stay together to form nucleus of an atom with electrons orbiting around them. This nucleus may sometimes get unstable and undergo a radioactive decay to achieve ...
The first decay scheme of 66Fe and the new consistent level scheme of 66Co were constructed based on beta-gamma-gamma coincidences, logft values, and Weisskopf estimates of transition probabilities. The half-life value of 830(80) ms for beta-decay of the ground state in 66Fe was extracted...
S A.,Barabash - 《Czechoslovak Journal of Physics》 被引量: 167发表: 2002年 Experimental Investigation of Double-Beta Decay in Se 82 double-beta decay source as the central electrode has yielded a lower limit of 1.0×10yr at 68% confidence level for the two-neutrino half-life of ... ...
About this article Cite this article Ejiri, H. Double-Beta-Decay Experiments: Present and Perspectives.Czechoslovak Journal of Physics52, 643–644 (2002). https://doi.org/10.1023/A:1015338120115 Issue DateApril 2002 DOIhttps://doi.org/10.1023/A:1015338120115 ...
In this work we focus on a search for double-beta decay of 130 to the first 0+ excited state of 130Xe (ββ01+) with CUORE-0. As shown in Fig. 1 this decay emits two electrons, which share a maximum energy of 734 keV, followed by a gamma cascade to the ground state of 130Xe...
The interest in this decay is mainly related to the existence of Majorons, massless Goldstone bosons that arise upon a global breakdown of B-L symmetry [1]. From the point of view of particle physics, (0]) is of course the most interesting of the decay modes for its important ...